[PATCH v2 1/2] drm/amdgpu: Add PACKET3_RUN_CLEANER_SHADER_9_0 for Cleaner Shader execution

[Srinivasan Shanmugam]

This commit introduces the PACKET3_RUN_CLEANER_SHADER_9_0 definition,
which is a command packet utilized to instruct the GPU to execute the
cleaner shader for the GFX9.0 graphics architecture.

The cleaner shader is a piece of GPU code that is responsible for
clearing or initializing essential GPU resources, such as Local Data
Share (LDS), Vector General Purpose Registers (VGPRs), and Scalar
General Purpose Registers (SGPRs). Properly clearing these resources  is
vital for ensuring data isolation and security between different
workloads executed on the GPU.

When the GPU receives this packet, it fetches and runs the cleaner
shader instructions from the specified location in the packet.  Thus by
preventing data leaks and ensuring that previous job states do not
interfere with subsequent workloads.

Cc: Christian König <christian.koenig at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/soc15d.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/soc15d.h b/drivers/gpu/drm/amd/amdgpu/soc15d.h
index a5000c171c02..cf93fa477674 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15d.h
+++ b/drivers/gpu/drm/amd/amdgpu/soc15d.h
@@ -552,6 +552,11 @@
 #              define PACKET3_QUERY_STATUS_DOORBELL_OFFSET(x)  ((x) << 2)
 #              define PACKET3_QUERY_STATUS_ENG_SEL(x)          ((x) << 25)
 
+#define PACKET3_RUN_CLEANER_SHADER_9_0                      0xD7
+/* 1. header
+ * 2. RESERVED [31:0]
+ */
+
 #define PACKET3_RUN_CLEANER_SHADER                      0xD2
 /* 1. header
  * 2. RESERVED [31:0]
-- 
2.34.1